E46Fanatics - View Single Post - Oil Weight for M54 doing lots of HPDEs
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Old 03-20-2010, 04:34 PM   #16
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Join Date: Apr 2006
Location: Montreal
Posts: 85
My Ride: '05 330i ZHP
Originally Posted by jmay87 View Post
TU is for technical update, I dont think an M54TU actually exists, just the M52TU that was in 99-00 e46's before the M54 came out.
TU stands for Technical Update. Engines were installed in vehicles headed for the Northeast. Change is in emissions package revised to reduce emissions and qualify as ULEV.
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